AP EAMCET Engineering 23 Apr 2019 Shift 1 Paper

Four blocks A, B, C and D of masses 6 kg, 3 kg, 6 kg and 1kg respectively are connected by light strings passing over frictionless pulleys as shown in the figure. The strings P and Q are horizontal. The coefficient of friction between the horizontal surface and the block B is 0.2 and the blocks A and B move together. If the system is released from rest then the tension in the string Q is
(Acceleration due to gravity =10 ms−2)